Results 21 to 30 of about 5,187,702 (267)

An improved ultraviolet spectral line list for the symbiotic star RR Telescopii

The Astrophysical Journal Supplement Series, 1993
We have remeasured wavelengths and intensities of International Ultraviolet Explorer (IUE) spectra of the symbiotic star, RR Tel. The main work is centered on the long 820 minute exposure high-resolution spectrum obtained on 1983 June 18. The list is intended to serve as a source of improved intensities and wavelengths for the ultraviolet spectrum of ...
G. A. Doschek, W. A. Feibelman
openaire   +1 more source

ANALYSIS OF THE SPECTRAL ENERGY DISTRIBUTION OFTHE COOLEST RCrB TYPE CARBON STAR DY Per

Odessa Astronomical Publications, 2008
We analysed the spectral energy distribution of the evolved carbon star DY Per by spectral synthesis technique. The red giant shows the photometric features of R CrB type stars.
L. A. Yakovina, A. V. Shavrina, Ya. V. Pavlenko, A. F. Pugach   +3 more
doaj   +1 more source

Retrieval of atmospheric CO₂ vertical profiles from ground-based near-infrared spectra [PDF]

Atmospheric Measurement Techniques, 2021
We evaluate vertical profile retrievals of CO2 from 0.02 cm−1 resolution ground-based near-infrared solar absorption spectra with the GFIT2 algorithm, using improved spectroscopic line lists and line shapes.
S. Roche, K. Strong, D. Wunch, J. Mendonca, C. Sweeney, B. Baier, B. Baier, S. C. Biraud, J. L. Laughner, G. C. Toon, B. J. Connor   +10 more
doaj   +1 more source

A solar spectral line list between 10 and 200 A modified for application to high spectral resolution X-ray astronomy

The Astrophysical Journal Supplement Series, 1984
A spectral line list for the 10-200 A range is developed from existing solar spectra for application to high spectral resolution measurements of astrophysical plasmas. The solar spectral line lists are merged into a single comprehensive list. The effect of the solar emission measure distribution is removed from the line intensities, which results in a ...
G. A. Doschek, R. D. Cowan
openaire   +1 more source

A LIBS Spectral Self-Absorption Correction Method Using Voigt Profile Fitting for the Application of Magnesium Analysis in Phosphorus Ore

, 2020
The concentration of MgO is one of the most important parameters in the phosphate ore flotation. The fast detection of the concentration of MgO has great significance for the optimization of the flotation, the improvement of the efficiency and the ...
Sun Lan-xiang, Qi Li-feng, Zeng Peng, Zhang Peng, Yu Hai-bin   +4 more
core   +1 more source

Waiting lists, waiting times and admissions: an empirical analysis at hospital and general practice level [PDF]

, 2004
We report an empirical analysis of the responses of the supply and demand for secondary care to waiting list size and waiting times. Whereas previous empirical analyses have used data aggregated to area level, our analysis is novel in that it focuses ...
Frank Windmeijer, Windmeijer, Frank, Windmeijer, F, Hoonhout, Pierre, Hugh S Gravelle, Gravell, Hugh, Gravelle, H, Hugh Gravelle, Hoonhout, P., Pierre Hoonhout, Gravelle, H., Windmeijer, F., Hoonhout, P   +12 more
core   +1 more source

Infrared Spectra of Small Radicals for Exoplanetary Spectroscopy: OH, NH, CN and CH: The State of Current Knowledge

Molecules, 2023
In this study, we present a current state-of-the-art review of middle-to-near IR emission spectra of four simple astrophysically relevant molecular radicals—OH, NH, CN and CH.
Svatopluk Civiš, Adam Pastorek, Martin Ferus, Sergei N. Yurchenko, Noor-Ines Boudjema   +4 more
doaj   +1 more source

Spectral line list of potential cosmochronological interest deduced from new calculations of radiative transition rates in singly ionized thorium (Th ii)

Monthly Notices of the Royal Astronomical Society, 2020
ABSTRACTIn this work, we report a list of 91 strong Th ii spectral lines in the visible wavelength region that could be used as cosmochronometers in future investigations to determine stellar ages from thorium radioactive decay. This list was established on the basis of a pseudo-relativistic Hartree–Fock model including core-polarization corrections ...
K Wang, P Quinet, P Palmeri, M R Godefroid, S Gamrath   +4 more
openaire   +2 more sources

Study on Spectral Interference in the Determination of Vanadium by ICP-OES

, 2020
Vanadium is an important scarce resource and strategic metal, and often coexists with a variety of complex metals in the form of secondary mineral phases in nature.
Zhang Yi, Li Ming, Li Lan-jie, Wang Shao-na, Liu Biao, Jin Xing, Du Hao, Zhao Bei-bei   +7 more
core   +1 more source

ON THE GF-VALUES FOR SOME DIATOMIC MOLECULAR SPECTRA

Odessa Astronomical Publications, 2017
In view of rich structure of the energy levels and the variety of transition types which are observable, molecules are the useful tool for investigation of physical parameters of stellar atmospheres, interstellar and circumstellar matter.
L. A. Kuznetsova, A. V. Shavrina
doaj   +1 more source